Plowshare



Maffe, 1923.*

O. PETERSON PLOWSHARE Filed Feb. 5, 1921 Patented Mar. 6, 19223.

oLE PETERSON, ory rrURNER, OREGON.

PLOWSEARE.

Application ledFebruar-y 3, 1921. Serial No. 442,131.

To all whom t may concer/n,

Be it known that I, OLE PETERSON, a :citizen of the United States, residing `at Turner, in the county of Marion and State of Oreon, have invented certain new and useful mprovements in Plowshares; and I Ydo hereby declare the following to bea full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which vitgappertains to make and-use `the same.

It is desirable in the successful operation of plows to provide a share that .will maintain a continuouskcutting edge, so as to readily pass through the earthand cut roots without becoming clogged or fouled, said share being self-sharpening and presenting an upper hard surface for the earth to slide over, a tough body portion to resist strain and fracture, and having a lower wearable surface which yields to the abrasive action of the earth in the operation of the plow, whereby to preserve a sharp cutting edge,

' said share having its lower surface presenting grooves and ribs in alternation and parallel with one another and with the land side of the plow and lying in the line of draft.

This invention provides a plow share of the character aforesaid possessing all the stated requisites and capable of being man- 4ufactured and marketed at substantially the same cost as the ordinary plow share which requires sharpening and dressing at given periods in order to operate efficiently and satisfactorily.

For a full understanding of the invention and the merits thereof reference is to be had to the following description and the drawings hereto attached, in which:

Figure 1 is a top plan view of a plow share embodying the invention,

Figure 2 -is a view of the plow share inverted,

Figure 3 is a vertical longitudinal section on line X-X of Figure 1, and

Figure 1 is a transverse section on the line Y=Y of Figure 1.

Corresponding and like parts are referred to in the following description andv designated in the several views of the drawings by like reference characters.

The plow share as a whole is designated by the reference numeral 1 and embodies a land side 2 and a blade 4. The configuration of the plow share may be of any ordifracture. plow share is relatively soft so as toV wear surfacehardened or tempered soas to resist` wear and presenta smooth polished .sur-face for the earth to `readily slide over. '.Tihe

Abody of the plow is relatively softl and tough so as'to resist stress and strain and* obviate The lower or under surface of the away byabrasive action `with the earth. This is essential orderto preserve a cutting edge. A ,plurality of .grooves 5.and ribs .3 are formed in the under surface of the plow share in alternation and extend parallel with 4one another and with the land side so as to lie in the line of draft. These grooves and ribs lend stability to the plow when in operation and compensate for side draft. The grooves 5 taper throughout their length. The forward ends of the grooves vanish into the cutting edge of the plow share. As a result of this construction, the cutting edge is continuous and practically straight and does not present any wave outline which wouldtend to collect. trash and cause the plow to foul when in operation. The diminished surface presented by the lower faces 0f the ribs results in a wearing away of the underside ofthe plow share in such ratio as to insure and Moreover,

maintain a sharp cutting edge. the ribs strengthen and reinforce the plow share. The ribs and grooves cooperate to neutralize and prevent side draft.

From the foregoing it will be understood that a plow share constructed in accordance with this invention presents an upper hard, wear resisting surface and a lower wearable surface, the main or body portion of the share being tough so as to resist strains and stresses and obviate fracture. The upper or top surface of the plow share may be case hardened or tempered in any manner. The point like the body of the sha-reis formed in its under side with ribs and grooves. This enables the point to maintain its given shape and prevents rounding thereof. As a result the plow `holds in the ground and is prevented. from served. By having tl e cutting edge continuous and smooth there is no tendency to collect trash or for tl e plow to foul5 The upper surfaee of the plowl share 'being hard maintains a polish, hence the earth will slide thereover with a minimum resista-nce. The under surface being relatively soft Wears away by abrasive action. The body portion bein` tough enables the plow share to withstand strain without becomingv fractured.

lVhat l claim is:

l. A plow share havinga substantially concaved soil penetrating bladen the active surface of said blade being tempered and polished to facilitate slidingof the soil thereover, a backing on said blade at the soil penetrating edge whereby the undersurface of the blade will be worn away by abrasive contact with the ysoil to afford a `self sharpening share, said backing being of a material less resista-nt to said abrasive action than the cutting edge of the blade to insure removal of the under surface of the lar/,sse

blade in the rear of the vcutting edge in substantially the same ratio as at said cutting edge, ribs on the backing plate adjacent the cuttinf-r edge of the blade7 and said. ribs being spaced apart and substantially tapered and vanishing at said edge.

2. A plow share having a blade concaved terminating` at the soil penetrating edge in a substantially horizontal plane, the upper surface of said blade beingtempered and polished to facilitate sliding of the soil thereover a backingl on the under surface of the blade of softer material than the blade at said edge, and ribs on the body of softer material than said edge directly enraging thek ground and parallel to the line of draft, and said ribs being tapered to vanish adjacent said edge.

In testimony whereof I aHiX my signature in presence of two witnesses.

' OLE PETERSON.

Witnesses:

WALTER PETERSON, L. PORTER. 

